zumba not in data base

After knee surgery and recovery I have decide to resume my Zumba workouts. (I was doing this before using MFP and went to log in the exercise and did not find it in the data base (much to my surprise) I have read conflicting info on how many calories are burned. Sorry I do not have a HRM and really cannot afford one at the moment.

Could someone tell me how many calories on average Zumba burns,

Thanks