Hyperloop One (formerly Hyperloop Tech) said in an info session last Fall that they were targeting launch intervals below 15 seconds. They also want a pod to comfortably carry a single intermodal container - 8'x8'x40'.
That space can seat around 40, which works out to 9600 passengers/hr capacity at 15 second intervals, on a single track.
The other angle to consider is that tracks very likely won't be singular. The tubes are light by infrastructure standards, you could pack two for each direction onto a route without dramatically increasing pylon costs. Add in the relatively low trip times, and in route segments with varying asymmetric demand it's feasible to switch one in four tracks' direction at midday. Eg a route into the city could easily run 3 in 1 out for mornings and 1 in 3 out for evenings.