Sure dude, people grow in rubber-maid containers and filing cabinets. How many plants really depends on what your plans are, and other factors like your lighting.
It is a small space, but enough for a 150w; perhaps even a 250w HID. It is more so the amount of light that is available that is going to determine what you will harvest, not the number of plants. Cramming more plants under a 250 watt bulb isn't going to get you any more than if you only had a couple.
This is where your grow style makes that determination, if you were going to let a couple plants veg out until they filled in and got just over a couple feet tall (maybe 2.5 feet) before you force flowering then that will do fine. If you were going to do more of a SOG it could involve many more plants (seedlings, or preferably clones) that will be much younger upon forcing. But again, the yield should be roughly the same provided that which ever way you do it there are at least enough plants in there so that you are not just wasting light, letting the carpet absorb it.