How many calories should I lose a week in order to lose weight?

[lost2007]

I weigh about 128 and 5 ft 3 inches tall. I do cardio 3times a week. I would do 30 minute cardio for the two days and the third day would do an hour of cardio. If my calculations are correct, the total calories I burn is 1700 per week. I don't watch my caloric intake although I do eat "healthy". My question is, is this enough calories to burn in order to lose weight? What do you think I should do to lose 5 more pounds?