Don't think it'll make much difference, unless you have cryogenic freezers. Room temperature is about 300K, fridge about 277K and freezer about 253K. So considering absolute temperature, I don't expect the temperature in household freezer to slow down pressure loss much.
However, if the balls are flat (i.e atmospheric pressure), by storing them at 150K (-123C), the pressure in the ball will half. After the internal pressure has equilibrated to atmospheric pressure at the cryogenic temperature, theoretically, the ball will be revived at room temperature as the pressure doubles! (provided the balls are treated with care at cryogenic temperature, since they are a brittle as glass then)