I've put males with a weak light in small cabinets before. Tilted over a surface easy to collect pollen from.
Pick off the pods which are about to open, until you have a LOT of pods about to open at the same time. Then let it rip and drop all the pollen at once.
If you're looking at long term storage of the pollen, be sure to dry it completely before mixing it with toasted flour and freezing it.