As it was already said, chances are almost 50-50. Notice that it's the same with 44, 55, 66 etc.
But, of course, it would be way better if the AQ was suited, because it would open possibilities for a top pair, straight and even flush.
If I were low on chips, I would rather hold the 33's, and go all in pre-flop (and hope only one player calls, cause it would increase my chances).
If my chips were okay, I would never go all in with such hand.
