Bouton soumettre dans le Bootstrap forme ne réagit pas sur la touche entrée

JS:

$(function(){
  $('.modal-content').keypress(function(e){
    if(e.which == 13) {
      //dosomething
      alert('Enter pressed');
    }
  })
})

HTML:

<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/js/bootstrap.min.js"></script>
<link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css" rel="stylesheet"/>
<div class="modal-content">
  <div class="modal-header">
    <button type="button" class="close" data-dismiss="modal" aria-label="Close">
      <span aria-hidden="true">×,
      </span>
    </button>
    <h4 class="modal-title">Datei speichern
    </h4>
  </div>
  <div class="modal-body">
    <p>Gib einen Dateinamen ein
    </p>
    <div class="form-group">
      <label class="input-label" for="project-bar-input">
      </label>
      <input type="text" class="form-control" id="project-bar-input">
    </div>
  </div>
  <div class="modal-footer">
    <button type="button" class="modal-cancel btn btn-default" data-dismiss="modal">Abbrechen
    </button>
    <button type="submit" class="modal-action btn btn-primary" data-dismiss="modal">Speichern
    </button>
  </div>
</div>