The House should have more seats anyway. We only have 435 because of the Apportionment Act; the Constitution allows for no more than one Rep per 30,000 people.
11K is perhaps far too many to be manageable, but 435 is clearly far too few.
Edit: the 14th amendment may have changed this math before the 1911 Apportionment bill fixed it at 435, but 1:700K is still far too high.