Poker: Can you win this hand on the River?

Yes of course you feel that you can definitely win this hand on the River. But there are only a few outs that can overcome your opponent's hand of a pair of Nines. You clearly see a Flush Draw, with two overcards to win the hand. There is an inside straight draw possibility as well, but will that card be good enough? Figure out for yourself and calculate the exact number of outs that will help you win this hand.