Computing the rate of return for a period

Suppose you have the opponunity to invest $1000 at the end of each of the next five years in exchange for $6000 at the end of the fifth year. What is the annual rate of return on this investment?

discount.rate(n = 5, fv = 6000, pmt = -1000, pv = 0, type = 0)

[1] 0.0913