Instance of 'Future<Map<dynamic,dynamic>>' on Flutter App

I've got a problem with my code. I try to show on my App this function that calls a class that has an API request. When I try to print the data returned, it only prints Instance of 'Future<Map<dynamic,dynamic>>' instead of what it is expected (the Magnitud value).

I'm quite new to Flutter, so every tip is well-received and I would appreciate it.

My class is

class GaelApi {
  String magnitud;
  String ubicacion;
  String latitud;
  String longitud;
  String hora;

  Future<void> getDatos(int index) async {
    try {
      // obtiene datos
      Response response =
          await get("https://api.gael.cl/general/public/sismos");
      List<dynamic> data = jsonDecode(response.body);

      Map primerSismo = data[0];
      // obtener las propiedades
      magnitud = primerSismo['Magnitud'];
      ubicacion = primerSismo['RefGeografica'];
      latitud = primerSismo['Latitud'];
      longitud = primerSismo['Longitud'];
      hora = primerSismo['Fecha'];
    } catch (e) {
      print(e);
      magnitud = 'No se pudo calcular la magnitud';
      ubicacion = 'No se pudo calcular la ubicacion';
      hora = 'No se pudo calcular la hora';
    }
  }
}

and what I tried is

class _SismosState extends State<Sismos> {
  Future<Map> recabarDatos(int index) async {
    GaelApi instancia = GaelApi();
    await instancia.getDatos(index);
    Map<String, String> datos = {'magnitud': instancia.magnitud};
    print(datos);
    return datos;
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(

      body: ListView.builder(
        itemCount: 5,
        itemBuilder: (context, index) {
          return Padding(
            padding: const EdgeInsets.symmetric(vertical: 1.0, horizontal: 5.0),
            child: Card(
              child: ListTile(
                  title: Text("${recabarDatos(index)}",
                  style: TextStyle(fontSize: 17))),
            ),
          );
        },
      ),
    );
  }
}

and a picture is this link

failure

Thank you!