Since it is an autoflower and you don't have any females, there's not really anything you can do with it. You could grow it out for the hell of it but it will be for nothing other than experience. I suppose you could start a new seed, isolate this male & grow it long enough to collect pollen when the sacs open then dispose of it and when your female is ready you could pollinate a branch or two. Be aware though that when those sacs open up, the whole area could be dusted with yellow pollen, especially if there are lots of sacs, a fan and you don't catch them quick.