Paul obtains a $300,000 mortgage loan a 5/1 interest-only ARM with a 10 year balloon at a 3% start rate, a 2% margin, and 2/6 caps. The initial monthly payment for the loan is $750. On the anniversary date of the loan, the index being used adjusts as follows: Year 1: 2.50% (initial year); Year 2: 2.75%; Year 3: 3.25%; Year 4: 3.50%; Year 5: 3.75%; Year 6: 3.00%; Year 7: 2.80%; and Year 8: 5.00%. 

What will be Paul's monthly payment in year 4