Titanic Hydra should give 500 HP
Currently it gives 2775 gold in stats for 3300 without counting the active and passive
Comparing this to Trinity Force and The Black Cleaver (Meddler said this item should fulfill a similar role for juggernauts - http://boards.pbe.leagueoflegends.com/en/c/champions-gameplay-feedback/rFbd7hyy-new-items-steraks-gage-and-titanic-hydra), the item is pathetically inefficient.
It's efficiency is 84% before its passives while The Black Cleaver's is 105% before its two passives, and Trinity Force is 121% efficient before its passives. Giving Hydra 500 HP makes it more in line with the other items stat wise. It still won't break 100% with the 500 HP but at least it'll be closer