there are in US, and in EU, and else where, i suspect, standard for what is a Pint--by volume of icecream.
first off, it shouldn't weight a pound, since heavy cream is lighter than water.. and if its good ice cream, it should be about 50% heavy cream. secondly, good ice cream is airy- even home made ice cream is made in a "churn" which beats air into the cream mixture as it chills and finally freezes it. (otherwise it is quintesently frozen..see another thread..)

I am sure the FDA, or some other Government agency has the standards somewhere-- Consumer reports might have them too, as background for a report on icecream.. but as i recall, 1 gallon of ice cream is supposed to weight something like 53 oz.. not 64 oz. and melted be equeal to 58oz.. by volume..(since as it melts, the air tends to get lost..