I don't think the math works out on that one.
This page [1] gives total meat consumption per person per year as 222.2 lb, which would be (x320 million) = 71 billion lb/year.
This page [2] gives total farm subsidies (which is a high estimate since it include all subsidies not just those to meat) as $20 billion.
So, that's $0.27/lb as an upper bound on the magnitude of the subsidy.
[1] https://www.globalagriculture.org/whats-new/news/en/32921.ht...
[2] https://www.downsizinggovernment.org/agriculture/subsidies