If we take the Nestle-26 text as database and calculate the needed pages, we get 6 pages for the remaining Hebrews and 23 pages for the Revelation. The Pastorals would take 11 pages. Kenyon also assumes 40 pages to be missing. We cannot be sure though if those books were really included originally in the codex.
So in total the codex originally contained 632 (AT) + probably 162 (NT) = 794 folios = 1588 pages.
Why ask a question that is answered in your own quote?