Daigo Dojima recently invested $5,500 in a project that is promising to return 2.25 percent per year. The cash flows are expected to be as follows:

End of Year Cash Flow

1 $1000

2 950

3 875

4 ???

5 850

Note that the 4th year cash flow is unknown. Assuming the present value of this cash flow stream is $7,500 (that is, CF0 = -7500), what is the missing cash flow value (that is, what is the cash flow at the end of the 4th year)?