mashed in a 6l pot in a nylon bag with a 1.8l sparge; because of greediness I pressed the bag out to get all the remaining wort
Based on boiling 6.90 gallonsliters at 1.057 for 60 minutes, this will decrease your wort by 1.00 gallonsliters, bringing your after boil OG to 1.065. You wanted an OG of 1.068. It looks like it will be under.