Solving For R In An Annuity Equation Annuities And Present Value ... Help Please!?

Annuities and present value ... help please!? - solving for r in an annuity equation

how much should he pay for a credit of 6% / a compound twice a year if you have $ 1000 every 6 months, 6 months to withdraw immediately for the next 5 years?

How do I solve this equation? with the formula

PV = R [1 - (1 + i) ^-n] / i