How much would I pay if I pay a car loan 14 months before the due date?

My total loan is of $30333.59 my monthly payment is of $421.30 for 71 months. I have made 57 payments by now, and I have sent $708 in addition to my monthly payment.But I wanna pay it before de due date.so if I pay it 14 months before the due date how much would my last payment be? Remember I have sent a total of $708 within the las 57 months.mi interest rate is 7.45%