Changing time interval in weekly calendar

Right now my Weekly Calendar shows up with one hour of interval. I'd like to know if it's possible to change this interval as I like (e.g 1hour30min interval).

My code to build the calendar:

$('#calendario').fullCalendar({
    header: false,  
    height: 800,
    defaultView: 'agendaWeek',

    views: {
        week: {
            columnFormat: 'dddd'
        }
    },
    firstDay: 1,
    weekends: false,
});